Antislipping and antiskidding attachment for tires.



G. B. WOODWORTH. l ANTISLEPING AND ANTISKIDDING ATTAQHMENT FORTIRES.

APPLICATION FILED4 DEOE. 1910.

u A. i@ @fm/MQ entren STATES PATE Y oFFion. A

errantes 13.v 'WoonWon'fr-H, Aor NIAGARA. FALLS, NEW onx.

- ANTISLIPPING'AND ANTISKIDD'ING Mz-IAcnmnivrron Trans.'

To all 'whom ii may concern."

Be it known lthat I, CHARLES B.- WoonwoRTH, a Subject of the King of Great Britaim'residing at Niagara Falls, in the county of Niagaraand State of New "York,l have invented'a new andvuseful Iniprovement in Antislipping and Antiskidding A ttachments for Tires, of` which the following is a speciioationi This invention relates to anti-slipping and A "fainti-slifidgding attachments for tires Which are constructs-dse that theycan he attached to and d'etachedl'vfrom the' tires of vehicle Wheels; and are ''desigfnedl vto increasethe grip or traction of the tires-y, 5in the rod to .prevent them ronts'lipping 'or skidding The object of..t-hi sfinventio' is to provide an anti-slippin' and anti-,skid/ding attachment of this kind Wliich-i'smple and inexpensive in construotiomvhieh vvi-lflv insure a secure and firm grip of the tire on the road and which will not/shift its'position on the tire non out into or unduly .Wear upon the face thereof.

In the. accompanying draw/ings: Figure l i is a fragmentary side elevtion ein vehicle Wheel and tire provided'Wit-h an attachment embodying the invention. 'v-flig. 2 is e. sectional elevation thereof, on an enlarged scale, in line 2 2, Fig. 1. Fig. 3 is a simila'r ,section vin line 3 3, Fig.` l. Fig. 4 is an enlarged bottom plan view of one of' the tread plates. thereof. Like reference characters refer to like parts in the several figures.

The attachment is intended especially for use upon pneumatic tires of the usual type, such as theone shown in the drawings, but 4it can be adapted for use, if desired, upon otherand' different styles andkinds of tires. It comprises a plurality of tread platesvA. `which are arranged'nt intervals about the `circumferential tread portion of the tire, ex-4 Fig. 5 is 4a. perspective rview tending transversely thereof, and Which are lp'o'nnected at their ends by suitable link connections. B to securing chains C .which surround the tire on opposite sides thereof adjacent to the rim of the Wheel and have their ends detachably oon11ectedj-tfogetlier .for detachably, securing the attsehment to .the tire. 1

y squarely thereon.

.f lASpecification of Letters latent. i PatentedNoV, 21, 1911 Application flied December 21, 191f). Serial No. 598,486.

The tread-plates A; are concave-convex in lia/ce throughout their length' to theroad,4

and when lboth are in engagement vvith'the surface of the .roadV the tread plate rests This insures a iirm and uniform grip of the. tread plate throughout its length on the roadyand aiiords. an ex'- tended bearing and Wearingsurfjace to the plate.

The edges a are bowed orcurved longitudinallyfof the plate so that they apportion of the plate and curve-'outwardly awayfrom each other toward their oppositel ends. The plate thus has a narrow or vcontracted middle or central portion a and wider or expanded end portions a2. vThe cur-ved form of the side 4edges affords a more extended bearing surface to the plate for o posing 'endwise movement thereof than 1f1 the` side edges oli the plate were straight longitudinally thereof. lhile this 'construction is preferred, the -side edges niay 'be be curved or bentgin any other .Suitable manner or form so'as to prevent longitudinal or endwise movement of the `plates on the surface-upon which they hear Y and hold the tire 'from slipping or skid- 'ding laterally on theroad.

, The connections B B which secure the ends of. the tread plates to the chains C C may be of any suitable construction and may he connected to the plates and chains z 'proach eachother in the middle or central., i

in any desirable manner. In the construe-' tion shown, the treadplates are preferably provided at their opposite ends with transversely extending loops or eyes as which are formed integrally with the plates by bending over end extensions thereof, and are so constructed that 'their' outer edge will lie approximatelyin the same planen/'ith the side edges a o, of vthe plates so as to engage 'the surface of the road and assist in preventing endwise movement. of the plates 'loo les

thereon. The connections B B comprise fiat links t Z) which are hinged together and one of which engages in the loop as of the tread plate while the other has hooked engageinfent with the chain C. These links are arranged with their flat faces on the inner side of the attachment so that when the latter is in position onthe tire, the flat faces of the links will engage the outer surface of the tire. The attachment thus presents a smooth surface to the tread and side portions of the tire and has no sharp edges or projecting portions on its inner side Which- Would tend to cut the tire or cause undue wear upon any part thereof. e

The chains' C C are of any suitable con struction and preferably have their ends connected together for detachably securing them to the tire, by asstrap take-up I) having snap hooks Z al in vtsvopposite ends for engagement with links in the ends ofthe chain.v The hooks d d are connected by a strap d and buckle Z2 which enable. any

slack in the chains to be taken up so that the attachment can be fitted snugly on the tire. Y As the attachment presents to the tire. a smooth interior surface throughout its length, it is necessary to provide means for preventing relative endwise movement between the attachment and the tire, as other- Wise theattachment would afford no grip 'for the tire on the road. This may be done in any suitable manner and the attachment may be secured to the rim, the spokes or any other fixed part of the-wheel. In the construction shown, a very simple device is employed for this purpose. The take-up straps D D on opposite sides of the tire are connected by a stra-p E which'extends over the inner side of the wheel rim between two adjacent spokes. When the attachment encounters any resistance which tends to hold it from turning with the tire, thertire ;will turn in the attachment andthe position of the attachment will be advanced on thetire until the strap E is brought into ,engagement with one of the spokes between' which it entends. This will stop further relative movementl between the parts in that 'direction. In. cas of movement between'- the parts in an opposite direction, the attachment will shift its position on the tire and the strap E will be brought into engagement with the other spoke and will then prevent further relative movement between the attachment and thetire inA that direction.

The strap E thus forms a very'siinple and inexpensive means for eectuallypnevenb ing-anyendwise movement of the attachment K 1,009,3ee

The 'narrow or contracted central portion e of the tread plate, by reason ofits shape, is of considerably greater strength and rigidity than the wider end portions ofthe plate and the plates 'are adapted to be arranged on the tire so that they A,will present their contracted central portions,J the earrtral tread portion the tire," yich carries the greater-` part 'of the weig toft the ve hicle, while their end portionsiwill eri-rage the outer tread portions ofthe tireaway fronrthe center where the weight carriedy isnot as great. The plates are thus able to' withstand the severe pressure and strain to which they are subjected without flattening.'

or spreadlng thereunder, and at the same time, by reason of their widerends, they lobtain a firmer and more secure grip upon the surface ofthe road than if they were of the same width throughout. In traveling over the road, the plates" being narrow in that portion where they are subjected to the p greatest weight and pressure, will readily sink into the tire so that the tire will roll over the plates Without producing any perceptible jar to the vehicle.

The connections for the plates permit them to roll somewhat on the surfaeeof the tire so that as the tire advances and Aone edge 4of a tread plate comes in Contact with the ino p surface of the road, the pressure thereon vcauses the plate to roll 'slightly on the tire so as to bring the other 'edge of the plate in Contact with the roadfand in the same manner, when the tire leaves the road, the-plate will roll sothat both edges 'will remain in contact with the surface of the road until lifted therefrom by the movement of the tire. This increases the grip of the platesl on the road,prolongs somewhat the length of contact of the plates on the road and tends' to .prevent the shifting of the plates on the 'tire' as they come in contttct with and deave theffsurface of the road. `The wear of the plates Aupon the tire is thus decreased .and the plates resent` no sharp edges' or angles to the sur ace of the tire which would tend to cut the same.v i While the tread plates shown are concaveconvex in cross section, the invention 1snot `limited to this construction but is intended to cover'any tread plate of this general form in cross section, having a substantially straightcentral portion which extends lon gitudinally thereof and is adapted to bear against the tire, and side portions which'project outwardly therefromaway from thctirc l and have bearing'edges which lie in substan -longitudinalaxis ofthe plateso as to re; ist

` attachment for tires, a tread plate which is l stantially in the same plane wherebyv they. are adapted to bear throughout their length tending transversely` of' the tire, substan tially as set forth; 1 i

' is ofv greater Width. at its ends than at its said plate being adapted to be secured on length on a' flatV surface, the convex face of to Abe secured on the tirel with its convex face against the I:tire and lts side Vedges ex-v "Aqllaxis of the plate7 said platebeing adapted --of the tire, substantially as set forth.

. cavoconvex cross section which is of greater .substantiall gin the' same plane whereby and extending transversely thereof, substantially as set forth.

tially the saine plane and have tions*l thereof Whiclfiextend at an angle 12g/.the

endwise movement of the plate when in engagement Witlrthesurface of the road.

The tread plates can be formed by stamp'- ing them from sheetrnetal and the entire attachment is simple in construct-ion, can` be economically manufactured and can bev guichlyand easily secured to and vdetached rom the tire. x

I claim as my invention: p

l. In an anti-slipping and. anti-skidding substantially concavconvex in cross sec` tion and-has curved side edges located subon a iiatsurface,` saidplate being adapted 'to be-secured on the tire with its concave face against the tire 'and its side' edges ex- 1 -2. In an antislipping and antieslidding attachment for tires, a tread plate of substantially concavoconvex cross section Whlch middle portionv and has .inwardly bowed side edges located substantially in the same plane whereby .they are adapted to bear throughout their length on' a latrsurface,

the tire with its convex face against the vtire and. its side` edges extending 4transversely 3. In an anti-slipping and anti-skidding attachment for tires, a tread -pla-te of ccn- Width at its ends than at its middle portion and hasyinwardly bowed side edges located they are a dpted to bear lthroughout their said plate aving a substantially straight central portion which extends longitudinally thereof, 'and said plate being adapted "is" be secured on the tire with `its straight portions in engagementtherewith and its side portions projecting outwardly from the tire 5. In an antislippin-gl and anti-skidding attachment fortires, a tread plate which is substantially concave-convex in cross-sec tion'and has its side edges located substantially in the same plane whereby they are adapted to bear throughout their length on a flat surface, each edge having portions thereof which extend at an angle tothe longitudinal axis of the plate to oppose end- Wise movement thereof= said, plate being adapted to be secured onthe tire Withits convex face against thetire and its side edges extending transversely of the tire,'.v

substantially as set forth. A

6. In an antislipping and anti-skidding substantially concave-convex 1n cross-section and has its-side edges located substantially in the same plane whereby they are adapted to bear throughout their length on a-liat surface, the convex face' of said plate having a substantially straight middle portionwhich extends longitudinally thereof,

and means for securing said plate en thev tire with its convex face against the tire and its side edges extending transverselyA of the tire, the connections between the ends ofr said plate and saidsecuring means being tially in the .saine plane whereby they areadapted to bearthroughout their length on a' flat surface, the convex face of said plate having a substantially straight middle portion which extends longitudinally thereof,

`and means for securing said plate on the vtire with its convex 'face against the tire and its side edges extending transversely of the tire, the connections between the ends` of said plate/and said securing means being arranged on the concave sidevof said vlate Without tho plane of the straight middle portion thereof and extending transversely A Lof the plate with their outer edges lying in substantially the same plane'with the side edges of said plate, substantially as set forth.

8.v In an'anti-slipping and anti-shi'dding attachment for tires, a tread plate Whichis substantially concave-convex in crosssec tion and has its 'side edges located substan tially in the same plane whereby they are adapted to bear throughout their length on a flat surface, said plate havingl inturned fastening loops at its opposite ends which extend transversely thereof on its concave side and have their outer edges' lying in substantially the same plane with the side edges of said plate, said. plate being adapted to be securedj on the tire with its convex los so attachment for tires, a tread plate which i-s face against the tire and its side edges eX-IV -treaol plate of cohoaVo-convex cross-section Whichis of greater Width at its endsthan at its middle portion and 'has `inwardly bowed side edgeslocated substantially in lthe sameplane whereby they are adapted to bear throughout theirV length'ion a at surface, the 'convex face of said plate having a substantially lstraight central portion which extends longitudinally thereof and has end extensions Wli'ohare turned in to form lfastening loops which extend transversely of the plate on the Aconcave side v thereof, and means vengaging said fastening 4,loo s for securing. saldfaplate on the tlre Wit its conex face'against the tire and its side edges 'extending transversely of the' tire, substantially as' set forth.

Witness my hand, Athis 13th day of De- 'oember, 1910. f

CHARLES B. WOODWORTH. Witnesses: y

EDWARD C. HARD,

A. L.' MCGEE. 

